Nano-LiNi0.5Mn1.5O4 spinel: a high power electrode for Li-ion batteries

Kuthanapillil M. Shaju, Peter G. Bruce

Research output: Contribution to journalArticlepeer-review

168 Citations (Scopus)

Abstract

Disordered and ordered forms of nano-Li[Ni0.5Mn1.5]O-4 spinel, have been prepared by a one-pot resorcinol-formaldehyde synthesis. Lithium intercalation into disordered nano-Li[Ni0.5Mn1.5]O-4 (delta) reveals good rate capability and cycling stability. It delivers 95.5% of the capacity at a rate of 10C (1500 mA g(-1)) and 88% at 20C (3000 mA g(-1)) compared with the capacity at low rate (0.2C). A capacity retention on cycling of 99.97% per cycle at 1C rate has also been observed. The superior electrochemical behaviour of disordered nano-Li[Ni0.5Mn1.5]O4-delta has been correlated with AC impedance data, which suggest a modified surface for the nanomaetrial prepared using the resoreinol-formaldehyde route compared with micron sized materials prepared by conventional solid state synthesis.

Original languageEnglish
Pages (from-to)5471-5475
Number of pages5
JournalDalton Transactions
Issue number40
DOIs
Publication statusPublished - 28 Oct 2008

Keywords

  • RECHARGEABLE LITHIUM BATTERIES
  • CATHODE MATERIALS
  • 5 V
  • ELECTROCHEMICAL PROPERTIES
  • POSITIVE-ELECTRODE
  • MACROPOROUS LI(NI1/3CO1/3MN1/3)O-2
  • SECONDARY BATTERIES
  • ASSISTED SYNTHESIS
  • PYROLYSIS METHOD
  • RATE CAPABILITY

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